This combined TEAC AD-850 cassette deck and CD player, which can also record to USB flash drives, includes a microphone jack with an echo function that can be used for karaoke. This model also supports recording and playback with USB flash drives for a total of three types of media. The built-in mic input jack also allows you to enjoy karaoke using backing music playing from a CD, cassette or USB flash drive. You can also mix in the mic input sound and record it to a cassette tape or USB flash drive. A variety of recording combinations are supported, including recording from a cassette tape, CD, external input or mic input to a USB flash drive (as an MP3 file) as well as recording from a CD, USB flash drive (MP3 file), mic  input or external input to a cassette tape. Extensive timer functions include cassette recording and playback as well as CD and USB flash drive playback. 

Various playback modes include programmed, repeat and shuffle playback from CDs and USB flash drives. This cassette mechanism is a two-head single one-way type and supports cassette tapes in normal, chrome and metal (playback only) positions. This model also offers key functions including pitch control playback (±10% adjustment range).